Flue bushing



FLUE BUSHING Filed June 20, 1958 v 3 F|G.I. 4/32? Patented Aug. 1, 1939 UNITED STATES 7 2,168,066 FLUE BUSHING Stanley F. Jackes, St. Louis, and Reynold Gehne, Pine Lawn, Mo.,- assignors to Jackes-Evans Manufacturing Company, St. Louis, Mo., a corporation of Missouri Application June 20, 1938, Serial No. 214,704

6 Claims.

This invention relates to bushings, and with regard to certain more specific features, to flue bushings for stovepipes, and the like.

Among the several objects of the invention may be noted the provision of a bushing which is adapted more rigidly than heretofore to connect either end of a stovepipe section with a flue opening; the provision of a bushing of the class described which permits of said connection with flues of various openings and of, various wall thicknesses at their inlet openingsithe provision of a bushing of the class described which is easy of application, and in the case of necessity, of easy removal; and the provision of apparatus of this class whichis simple to manufacture. and which may be sold cheaply. Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly comprises the elements and combinations. of elements, features of construction, and arrangements of parts which will be exemplified in the structures hereinafter described, and the scope of the application of which will be indicated in the following claims. I

In the accompanying drawing, in which is illustrated one of various possible embodiments of the invention,

Fig. 1 is a vertical section through a stovepipe and a flue, showing the application of the invention to a coal stove;

Fig. 2 is a view similar to Fig. 1 showing the application of the invention to a wood stove;

Fig. 3 is a vertical sectionon an enlarged scale, taken on line 3-3 of Fig. l; and,

Fig. 4 is a vertical section showing a step in the application of the invention.

Similar reference characters indicate corresponding parts throughout the several views of the drawing.

The inlet openings El for flues, chimneys, and the like, heretofore have been made to fit the entering Stovepipe quite loosely. -This is not only because the masonry or the like, of which the chimney is made, is coarse, but also because the flue must be adapted to have connected therewith both so-called coal stoves (such as shown at I in Fig. 1) and also wood stoves (such as shown at 3 in Fig. 2).

Most stovepipe sections, such as shown at 5, are made with crimped, tapered ends I, which are adapted to slide into and frictionally fit within uncrimped and non-tapered ends, such as shown at 9. This is in the case of both straight sections and elbows, as shown.

In the case of a coal stove its outlet l is made to fit within the receiving end 9 of a pipe section 5; whereas, in the case of the coal stove, such as shown at 3, the outlet I3 is made to receive therein the crimped and tapered end 1 of the pipe Se t o e ea on for th s (i i-Terence is that inthe case of a coal stove it is important that the relatively dense smoke be definitely projected into successive pipe sections, such as at H and 1; whereas, in the case of a wood stove, this consideration is not as important as the one that.

, enter the flue opening 0 is relatively small;

whereas, in the case of a wood stove, the relatively large pipe end enters the flue opening. It will thus be seen that, even with an accuratelymade flue opening, it must be made large enough to receive the larger pipe end, which results in a loose fit for the smaller pipeend. Hence the pipes have been loosely connected in the flue openings in an unsafe manner in many instances. A cementing operation to make a tight connection is expensive. I

This invention also dispenses with unsightly wire braces and the like for anchoring the last pipe section at the flue opening. y

We provide a bushing for use at the opening 0 which comprises a sleeve or thimble I! (see Fig. 4), having an outwardly directed bead l9 around its central portion. Extending in one direction fromthe bead I9 is a crimped, inwardly tapered end 2|, corresponding to the tapered end I of a pipe section 5..

Directed from the opposite side from the bead 1 l9 is a larger and relatively smooth, non-tapered end 23, corresponding to the ends 9 of a pipe section 5. Both ends 2| and 23 of the thimble fit into the flue opening 0, the relatively smaller end 2|, of course, fitting with more clearance.

A separate flange 25 is provided, which is adapted to slip, either over'the large end of the thimble II or over its smaller end. 2|, but in either case abutting and fitting closely at one side or another of the outward beadl9, in order to efiect a stop and peripheral closure and cover for the joint between pipe and flue. The flange 25 contacts the outer side of the flue or chimney, and is in turn contacted by said bead l9, also to prevent the thimble II from being pushed in too far.

In order that the thimble l1 may be prevented from being pulled outward, the following construction is used:

On opposite sides of the bead l9 holes 21 and 29 are located for receiving a bolt 3|. The bolt 3| has a square head 33 and is threaded to receive .a wing nut 35. The body of the bolt fits in either hole 21 or 29.

Inside of the thimble I! is located a bar 31 of U shaped section, as indicated'in Fig. 3. The

square or polygonal head 33 of the bolt 3| slidably fits the U-shape of the bar. The bolt 3| also slidably passes through a slot 39 in the bar 31.

The end of the bar adjacent the bolt 3! is turned down at right angles to form a finger piece or handle 4|. Its other end is hooked up as indicated at 43. To preserve its strength, the flanges of the bar, which determine its U-shape, are extended to the hook 43. At the :end of the hook 43 is a claw or finger 45. r

The thimble l! is applied as follows:

Assuming that the crimped end 2! is to be applied to the flue opening 0, the bolt '31 is ap-- plied through the hole 21, as shown. The wing nut 35 is loosened so that the hook l3 and the finger 35 are positioned within the imaginary projection of the thimble cylinder (Fig. 4) Thus, the hook may readily pass into the flue opening 0 Without the requirement of tilting the thimble or bushing H. The wing nut 35 is then drawn up until the bar 3'! is more or less parallel to the axis of the thimble i'l. Before tightening the nut 35, the operator, while holding his thumb at A, pulls with his forefinger on the 'part 4|, so that the claw G5 is drawnagainst the inside of the flue wall. The hook 43 thus holds the thimble IT in place.

nection. Since the polygonal head 33 of the bolt 3i has flats between flanges 31', it is not necessary to reach insideof the bushing ll to hold the head 33 while turning the nut 35.

[Should it bedesired toreverse the thimble l! in: the flue opening 8, the flange 25 is applied from the end 23 0f the bushing, thus becoming adjacent the other side of the-beadlfl, The wing nut 35 is then removed from the bolt 3| and the members 31 reversed in position, with the hook 43 extending from the end 23 of the bushing. This places the slot 39 adjacent the hole 29, so that the ,bolt 3| may again'be positioned in the slot 39 and through the hole 29, the wing nut 35 being replaced.

After thethimble'is in position, the pipe for connecting .the stove .theretoemay be attached.

One of the advantages of the invention is that .holding bars 31 may be carried in a collection separate from the collection of thimbles, and likewise'the flanges 25 may be carriedin a separate collection. Assembly may then be made according to thenecessities of use.

Another advantage is that the operations for assembling the bushing in the flue opening 0 can all be made with great facility.

It is clear that, :if desired, a plurality of the holding bars may .be used around the periphery of the pipe. V

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As many changes could be made in carrying out the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the. accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

We claim: V

. 1. A flue bushing comprising a centrally beaded .ithimble, an extension of one diameter extending The wing nut 35 is then further tightened to make permanent the *tight'confrom one side of said bead, an extension from the other side of a larger diameter, a flange adapted to he slipped over either of said exten- .sions and to abut said bead, said thimble having an opening in each extension, 2. separately organized clamp bar adapted to be associated with either of said openings and to be moved into holding positions, and manually operable clamping means for maintaining a predetermined position of the bar.

3. A flue bushing comprising a centrally beaded thimble, an extension of one outlet diameter extending from one side'of said bead, an extension.

from the other side of a larger outlet diameter, a flange adapted to be slipped over either of said extensions and to abut said bead on either side thereof, openings on opposite sides of said beads, a 'draw' bar having a" slot adapted to be placed adjacent either-opening, and 'manually operable clamping means adapted to pass through either opening and said slot.

4. A flue bushing comprising a centrally beaded thimble, an extension of one outlet diameter extending from one side of said bead, an extension from the other side of a larger outlet diameter, a flange adapted to be slipped over either of said extensions and to abut said bead on either side thereof, openings on opposite sides of said heads, a drawbar having a slot adapted to be placed adjacent'either opening, manually operable clamping means adapted to pass through either opening and said slot, said draw bar being movable longitudinally of the axis of'the bushing and having a hook at the end, the length of said draw bar being such that the hook protrudes from the end of the bushing.

5. A flue bushing comprising a length of pipe having a lateral opening therein, a draw bar having a slot adjacent said opening, said draw bar having a U-shaped cross section with the flat side adjacent the inside of the pipe, a hook at one end of the draw bar and'beyond one end of the pipe, means at the other end of the draw bar for drawing the hook inwardly toward the pipe, a clamping bolt passing through the lateral opening and the slot and having a polygonal head fitting the groove formed by the U-shaped of the draw bar, and a wing nut on. the outside of said bolt.

6. A flue bushing comprising a length of pipe having lateral holes therein, one each of which holes is closer to one end of the pipe than another, a hooked draw bar having slotted means adapted .to be positioned adjacent one or the other of said holes when said hook is adjacent one orthe other ends of the pipe, the draw bar being long enough to permit said hook to extend from the adjacent end of the pipe, and clamping means passing through the slot means and the adjacent holes permitting lateral swinging of said hook from its position within the projected cylinder of the pipe to a position outside of said projected cylinder.

STANLEY F. JACKES. REYNOLD GEHNE. 

